John the Apostle
John 6:52WEB·traditional attribution

The Jews therefore contended with one another, saying, “How can this man give us his flesh to eat?”

Geneva Bible Notes Reformed

The Jews therefore strove among themselves, saying, How can this man give us [his] flesh to eat? (12) Flesh cannot make a difference between fleshly eating, which is done by the help of the teeth, and spiritual eating, which consists in faith: and therefore it condemns that which it does not understand: yet nonetheless, the truth must be preached and taught.

John Calvin Reformed

52. The Jews therefore debated among themselves. He again mentions the Jews, not by way of honor, but to reproach them with their unbelief, because they do not receive the well known doctrine concerning eternal life, or, at least, do not inquire modestly into the subject, if it be still obscure and doubtful.

John Gill Reformed Baptist

Whoso eateth my flesh, and drinketh my blood,.... Spiritually by faith, as explained in the preceding verse: hath eternal life; the principle of spiritual life, which is evidently implanted in him, as appears from his eating and drinking; and is a durable and lasting principle: grace is an incorruptible seed; every part of it is abiding and permanent; and it is itself the beginning, pledge...